Goodwill and Other Intangible Assets (Goodwill Rollforward) (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Changes in Carrying Amount of Goodwill
Balance as of December 31, 2019	$ 20,624
Acquisitions	132
Foreign currency translation and other adjustments	(22)
Balance as of March 31, 2020	20,734
Google
Changes in Carrying Amount of Goodwill
Balance as of December 31, 2019	19,921
Acquisitions	132
Foreign currency translation and other adjustments	(17)
Balance as of March 31, 2020	20,036
Other Bets
Changes in Carrying Amount of Goodwill
Balance as of December 31, 2019	703
Acquisitions	0
Foreign currency translation and other adjustments	(5)
Balance as of March 31, 2020	$ 698

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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